Combined cycle air/air heat pump

Refrigeration – With means preventing or handling atmospheric condensate... – Means utilizing heat developed by refrigeration producer

Patent

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Details

623241, 623245, 252 67, F25B 1300, F25B 4700

Patent

active

053097327

ABSTRACT:
An air-to-air heat pump has a first passageway having an inlet and an outlet both communicating with air outside the building, and having a first heat exchanger constituting an evaporator for a first refrigerant contained therein during a heating cycle, and has a second passageway having an inlet and an outlet both communicating with relatively warm air inside the building, and having a second heat exchanger constituting a condenser for the first refrigerant contained therein during the heating cycle and having the usual active heat pump circuit including the first and second heat exchangers. The invention provides a heat pipe containing a second refrigerant and having a first normally higher end in the first passageway and a second, normally lower end in the second passageway, the second refrigerant being capable of being evaporated by said relatively warm air in the second passageway and being capable of being condensed by cold air in the said first passageway. The first end is positioned in the first passageway upstream of the first heat exchanger whereby cold air is pre-heated by condensation of said second refrigerant before contacting said first heat exchanger so that frosting on the first heat exchanger in cold air conditions is inhibited.

REFERENCES:
patent: 4598558 (1986-07-01), Bingham
patent: 4827733 (1989-05-01), Dinh
patent: 4840042 (1989-06-01), Ikoma et al.
patent: 4843837 (1989-07-01), Ogawa et al.
patent: 4938035 (1990-07-01), Dinh

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